English verb conjugation
CAN STIFLE

Regular verb: stifle - stifled - stifled

Affirmation

Simple form	V-ing form
I can stifle you can stifle he can stifle we can stifle you can stifle they can stifle	I can be stifling you can be stifling he can be stifling we can be stifling you can be stifling they can be stifling
Perfect	V-ing perfect
I can have stifled you can have stifled he can have stifled we can have stifled you can have stifled they can have stifled	I can have been stifling you can have been stifling he can have been stifling we can have been stifling you can have been stifling they can have been stifling

Negation

Simple form	V-ing form
I can't stifle you can't stifle he can't stifle we can't stifle you can't stifle they can't stifle	I can't be stifling you can't be stifling he can't be stifling we can't be stifling you can't be stifling they can't be stifling
Perfect	V-ing perfect
I can't have stifled you can't have stifled he can't have stifled we can't have stifled you can't have stifled they can't have stifled	I can't have been stifling you can't have been stifling he can't have been stifling we can't have been stifling you can't have been stifling they can't have been stifling

Interrogative form

Simple form	V-ing form
can I stifle? can you stifle? can he stifle? can we stifle? can you stifle? can they stifle?	can I be stifling? can you be stifling? can he be stifling? can we be stifling? can you be stifling? can they be stifling?
Perfect	V-ing perfect
can I have stifled? can you have stifled? can he have stifled? can we have stifled? can you have stifled? can they have stifled?	can I have been stifling? can you have been stifling? can he have been stifling? can we have been stifling? can you have been stifling? can they have been stifling?

Interro-negative form

Simple form	V-ing form
can't I stifle? can't you stifle? can't he stifle? can't we stifle? can't you stifle? can't they stifle?	can't I be stifling? can't you be stifling? can't he be stifling? can't we be stifling? can't you be stifling? can't they be stifling?
Perfect	V-ing perfect
can't I have stifled? can't you have stifled? can't he have stifled? can't we have stifled? can't you have stifled? can't they have stifled?	can't I have been stifling? can't you have been stifling? can't he have been stifling? can't we have been stifling? can't you have been stifling? can't they have been stifling?